package com.gaga.web.interceptor;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.PrintWriter;

public class AuthorizationInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        if(request.getSession().getAttribute("loginUser")==null){
            response.setContentType("text/html;charset=UTF-8");
            PrintWriter out = response.getWriter();
            out.print("<script>alert('请先进行登陆，再进行后续操作！(Interceptor 控 制)');location.href='"+request.getContextPath()
                    +"/login.jsp';</script>");
            return false;
        }else{
            return true;
        }
    }
        @Override
        public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
                               ModelAndView modelAndView) throws Exception { }

        @Override
        public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler,
                                    Exception ex) throws Exception { }
}
